Unified Interior Regions

California

The Southwest Region includes California, Nevada, and Arizona. The Regional Office, headquartered in Sacramento, provides Center oversight and support, facilitates internal and external collaborations, and works to further USGS strategic science directions.

States L2 Landing Page Tabs

Filter Total Items: 421
Date published: November 30, 2018
Status: Active

Ventura Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered, technically recoverable conventional and continuous oil and gas resources of the Ventura Basin Province 5013.

     

    Date published: November 30, 2018
    Status: Active

    Central Coastal Oil and Gas Assessments

    The U.S. Geological Survey completed the following assessments of the Central Coastal Province 5011.

      Date published: November 30, 2018
      Status: Active

      Northern Coastal Oil and Gas Assessments

      The U.S. Geological Survey completed the following assessment of undiscovered oil and gas resources of the Northern Coastal Province 5007.

      Date published: November 30, 2018
      Status: Active

      Sonoma-Livermore Basin Oil and Gas Assessments

      The U.S. Geological Survey completed the following assessment of undiscovered oil and gas resources of the Sonoma-Livermore Province 5008.

        Date published: November 29, 2018
        Status: Active

        Towards Near Surface Ground Motion Characterization in Oklahoma and Texas through Active- and Passive-Seismic Site Characterization- Alan Yong

        Earthquakes, such as the 2011 M5.7 Prague, Oklahoma, and recent northern Texas M4 event, demonstrate the need for improved
        understanding of site amplification and seismic hazards in the central United States. The intern will be trained by USGS scientists to use the state-of-the-art site investigation methods at seismic station sites in California before applying the methods in Oklahoma...

        Date published: November 28, 2018
        Status: Active

        Warren Subbasin Groundwater Recharge

        The Hi Desert Water District (HDWD) provides water service to about 10,000 customers in the areas of Yucca Valley, Yucca Mesa, and some unincorporated areas of San Bernardino County. The study area is the 19 square mile Warren subbasin of the Morongo groundwater basin (approximately 100 miles east of Los Angeles, California).

        Date published: November 28, 2018
        Status: Active

        Mercury

        Mercury is a rare, dense metal, slightly more common than gold in the earth's crust. Mercury occurs in several different forms, the most important of which is methylmercury. Methylmercury is the form most readily incorporated into biological tissues and most toxic to humans. Methylmercury accumulates and biomagnifies in the food chain, reaching highest concentrations in predatory fish such as...

        Date published: November 28, 2018
        Status: Completed

        Estimating Groundwater Withdrawals and Consumptive Use for Principal Aquifers

        The USGS works in cooperation with local, State, and Federal agencies to compile and disseminate data on the Nation's water use. The annual water-use estimates are reported at the county, State, and national levels and provide fundamental input to regional hydrologic models. These estimates commonly represent the largest stresses in most aquifers and are needed by local managers to steward the...

        Date published: November 28, 2018
        Status: Completed

        Assessing the role of winter flooding on baseline greenhouse gas fluxes from corn fields in the Sacramento – San Joaquin Bay Delta

        Understanding the magnitude and variability of baseline greenhouse gas (GHG) emissions from the Sacramento – San Joaquin Bay Delta is critical for current and future land management. For example, strategies that maximize carbon sequestration in soils and plants while minimizing unintended consequences such as GHG emissions are likely to produce both economic and environmental benefits for the...

        Contacts: Brian Pellerin
        Date published: November 27, 2018
        Status: Active

        Pesticide Occurrence in California – Yolo Bypass Pesticide Analyses

        The project is part of an overarching Interagency Ecological Program (IEP)/Department of Water Resources (DWR) study that is focused on understanding the processes by which the Yolo Bypass may provide a fall food web supply for the Cache Slough Complex and downstream regions of the Sacramento/San Joaquin Delta.  Several studies conducted since 2011 have shown that phytoplankton blooms can be...

        Contacts: James Orlando
        Date published: November 27, 2018
        Status: Active

        Effects of Climate on Snowmelt and Water Availability for Reservoirs in the Southern Sierra Nevada

        Potential changes in air temperature and precipitation due to changes in climate may result in more variable or smaller snow packs and earlier snowmelt in the southern Sierra Nevada in upcoming years. These conditions are likely to result in increased difficulty in planning reservoir operations for hydroelectric power and water availability during springtime snowmelt in this region. Reservoir...

        Date published: November 26, 2018
        Status: Completed

        Methylmercury cycling and export from agricultural and natural wetlands in the Yolo Bypass

        The purpose of the work conducted by the USGS California Water Science Center is to help guide Yolo Wildlife Area management practices by identifying the relationships between management effects on dissolved organic matter properties and the resulting role of dissolved organic matter in mercury methylation and biotic uptake measured by the cooperating USGS scientists. The information gathered...

        Contacts: Jacob A Fleck
        Filter Total Items: 583
        Date published: January 1, 2019

        Sediment Thickness--Punta Gorda to Point Arena, California

        This part of DS 781 presents data for the sediment-thickness map of the Punta Gorda to Point Arena, California, region. The raster data file is included in the "SedimentThickness_PuntaGordaToPointArena.zip," which is accessible from https://doi.org/10.5066/P9PNNI9H.
        As part of the USGS's California State Waters Mapping Project, a 50-m grid...

        Date published: January 1, 2019

        Grain-size distributions from San Pablo Bay, California, 2011 to 2012

        Sediment cores were collected from San Pablo Bay, in the Sacramento-San Joaquin Delta in California by the U.S. Geological Survey Pacific Coastal and Marine Science Center (PCMSC) during multiple surveys from 2011 to 2012. The cores were analyzed for grain-size distributions at the PCMSC sediment lab.

        Date published: January 1, 2019

        CoSMoS (Coastal Storm Modeling System) Central California v3.1 flood-hazard projections: 20-year storm in San Francisco County

        This data contains geographic extents of projected coastal flooding, low-lying vulnerable areas, and maximum/minimum flood potential (flood uncertainty) associated with the sea-level rise (SLR) and storm condition indicated.
        The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-ind

        Date published: January 1, 2019

        Transgressive Contours—Point Sur to Point Arguello, California

        This part of DS 781 presents data for the transgressive contours of the Point Sur to Point Arguello, California, region. The vector data file is included in the “TransgressiveContours_PointSurToPointArguello.zip,” which is accessible from https://doi.org/10.5066/P97CZ0T7.
        As part of the USGS's California State Waters Mapping Project, a 50-m...

        Date published: January 1, 2019

        CoSMoS (Coastal Storm Modeling System) Central California v3.1 flood depth and duration projections: 1-year storm in Santa Barbara County

        This data contains maximum depth of flooding (cm) in the region landward of the present-day shoreline for the sea-level rise (SLR) and storm condition indicated.
        The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-le

        Date published: January 1, 2019

        CoSMoS (Coastal Storm Modeling System) Central California v3.1 water-level projections: 1-year storm in San Luis Obispo County

        This data contains model-derived total water levels (in meters) for the sea-level rise (SLR) and storm condition indicated.
        The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenarios. Projecti

        Date published: January 1, 2019

        CoSMoS (Coastal Storm Modeling System) Central California v3.1 water-level projections: average conditions in San Mateo County

        This data contains model-derived total water levels (in meters) for the sea-level rise (SLR) and storm condition indicated.
        The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenarios. Projecti

        Date published: January 1, 2019

        CoSMoS (Coastal Storm Modeling System) Central California v3.1 water-level projections: 20-year storm in San Mateo County

        This data contains model-derived total water levels (in meters) for the sea-level rise (SLR) and storm condition indicated.
        The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenarios. Projecti

        Date published: January 1, 2019

        Structure-from-motion point cloud of Mud Creek, Big Sur, California, 2017-05-19

        Presented here is a point cloud collected by the U.S. Geological Survey (USGS) using an oblique plane-mounted camera system, covering the area of the Mud Creek landslide on California State Route 1 (SR1), Mud Creek, Big Sur, California. The point cloud is referenced to previously published lidar data and contains RGB information as well as XYZ. Point Cloud Coordinates are in NAD8

        Date published: January 1, 2019

        CoSMoS (Coastal Storm Modeling System) Central California v3.1 water-level projections: 100-year storm in San Francisco County

        This data contains model-derived total water levels (in meters) for the sea-level rise (SLR) and storm condition indicated.
        The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenarios. Projecti

        Date published: January 1, 2019

        CoSMoS (Coastal Storm Modeling System) Central California v3.1 water-level projections: 100-year storm in Santa Barbara County

        This data contains model-derived total water levels (in meters) for the sea-level rise (SLR) and storm condition indicated.
        The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenarios. Projecti

        Date published: January 1, 2019

        CoSMoS (Coastal Storm Modeling System) Central California v3.1 wave-hazard projections: 1-year storm in Santa Barbara County

        This data contains maximum model-derived significant wave height (in meters) for the sea-level rise (SLR) and storm condition indicated.
        The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenar

        Filter Total Items: 481
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        Year Published: 2016

        California State Waters Map Series—Offshore of Aptos, California

        Introduction In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP), designed to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats, and geology within California’s State Waters. The CSMP approach is to create highly detailed seafloor maps through...

        Cochrane, Guy R.; Cochran, Susan A.; Cochrane, Guy R.; Johnson, Samuel Y.; Dartnell, Peter; Greene, H. Gary; Erdey, Mercedes D.; Dieter, Bryan E.; Golden, Nadine E.; Hartwell, Stephen R.; Ritchie, Andrew C.; Kvitek, Rikk G.; Maier, Katherine L.; Endris, Charles A.; Davenport, Clifton W.; Watt, Janet T.; Sliter, Ray W.; Finlayson, David P.; Krigsman, Lisa M.
        Cochrane, G.R., Johnson, S.Y., Dartnell, P., Greene, H.G., Erdey, M.D., Dieter, B.E., Golden, N.E., Hartwell, S.R., Ritchie, A.C., Kvitek, R.G., Maier, K.L., Endris, C.A., Davenport, C.W., Watt, J.T., Sliter, R.W., Finlayson, D.P., and Krigsman, L.M. (G.R. Cochrane and S.A. Cochran, eds.), 2016, California State Waters Map Series—Offshore of Aptos, California: U.S. Geological Survey Open-File Report 2016–1025, pamphlet 43 p., 10 sheets, scale 1:24,000, http://dx.doi.org/10.3133/ofr20161025.

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        Year Published: 2016

        Water availability and land subsidence in the Central Valley, California, USA

        The Central Valley in California (USA) covers about 52,000 km2 and is one of the most productive agricultural regions in the world. This agriculture relies heavily on surface-water diversions and groundwater pumpage to meet irrigation water demand. Because the valley is semi-arid and surface-water availability varies substantially,...

        Faunt, Claudia C.; Sneed, Michelle; Traum, Jonathan A.; Brandt, Justin T.
        Faunt, C.C., and others, 2015, Hydrogeology Journal, 10.1007/s10040-015-1339-x

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        Year Published: 2016

        Anticipating environmental and environmental-health implications of extreme storms: ARkStorm scenario

        The ARkStorm Scenario predicts that a prolonged winter storm event across California would cause extreme precipitation, flooding, winds, physical damages, and economic impacts. This study uses a literature review and geographic information system-based analysis of national and state databases to infer how and where ARkStorm could cause...

        Plumlee, Geoffrey S.; Alpers, Charles N.; Morman, Suzette A.; San Juan, Carma A.

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        Year Published: 2016

        Habitat suitability criteria via parametric distributions: estimation, model selection and uncertainty

        Previous methods for constructing univariate habitat suitability criteria (HSC) curves have ranged from professional judgement to kernel-smoothed density functions or combinations thereof. We present a new method of generating HSC curves that applies probability density functions as the mathematical representation of the curves. Compared with...

        Som, Nicholas A.; Goodman, Damon H.; Perry, Russell W.; Hardy, Thomas B.
        Som, N.A., D.H. Goodman, R.W. Perry, and T.B. Hardy. 2015. Habitat suitability criteria via parametric distributions: estimation, model selection and uncertainty. River Res. Appl. (Early View).

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        Year Published: 2016

        Diel activity patterns of juvenile late fall-run Chinook salmon with implications for operation of a gated water diversion in the Sacramento–San Joaquin River Delta

        In the Sacramento-San Joaquin River Delta, California, tidal forces that reverse river flows increase the proportion of water and juvenile late fall-run Chinook salmon diverted into a network of channels that were constructed to support agriculture and human consumption. This area is known as the interior delta, and it has been associated with...

        Plumb, John M.; Adams, Noah S.; Perry, Russell W.; Holbrook, Christopher; Romine, Jason G.; Blake, Aaron R.; Burau, Jon R.
        Plumb, J.M., N.S. Adams, R.W. Perry, C.M. Holbrook, J.G. Romine, A.R. Blake, and J.R. Burau. 2015. Diel activity patterns of juvenile late fall-run Chinook salmon with implications for operation of a gated water diversion in the Sacramento-San Joaquin River Delta. River Research and Applications. (Early View). DOI: 10.1002/rra.2885.

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        Year Published: 2016

        Regional analysis of social characteristics for evacuation resource planning: ARkStorm scenario

        Local planning is insufficient for regional catastrophes; regional exercises are needed to test emergency plans and decision-making structures. The ARkStorm scenario would trigger a mass evacuation that would be complicated by the social characteristics of populations [e.g., vehicle ownership, age, poverty, English language limitation (ELL), and...

        Wein, Anne; Ratliff, Jamie L.; Allan Baez; Sleeter, Rachel
        Wein, A., Ratliff, J., Báez, A., and Sleeter, R. (2014). "Regional Analysis of Social Characteristics for Evacuation Resource Planning: ARkStorm Scenario." Nat. Hazards Rev. , 10.1061/(ASCE)NH.1527-6996.0000161 , A4014002

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        Year Published: 2015

        Coastal Storm Modeling System (CoSMoS)

        The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future SLR scenarios, as well as long-term shoreline change and cliff retreat. CoSMoS v3.0 for Southern California shows projections for future...

        Barnard, Patrick; Erikson, Li; Foxgrover, Amy; Herdman, Liv; Limber, Patrick W.; O'Neill, Andrea; Vitousek, Sean
        Barnard, Patrick, 2015, Coastal Storm Modeling System (CoSMoS): U.S. Geological Survey Data Release, doi:10.5066/F7T151Q4.

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        Year Published: 2015

        California State Waters Map Series—Offshore of Pigeon Point, California

        Introduction  In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP), designed to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats, and geology within the 3-nautical-mile limit of California’s State Waters. The CSMP approach is to create highly...

        Cochrane, Guy R.; Cochran, Susan A.; Cochrane, Guy R.; Watt, Janet T.; Dartnell, Peter; Greene, H. Gary; Erdey, Mercedes D.; Dieter, Bryan E.; Golden, Nadine E.; Johnson, Samuel Y.; Endris, Charles A.; Hartwell, Stephen R.; Kvitek, Rikk G.; Davenport, Clifton W.; Krigsman, Lisa M.; Ritchie, Andrew C.; Sliter, Ray W.; Finlayson, David P.; Maier, Katherine L.
        Cochrane, G.R., Watt, J.T., Dartnell, P., Greene, H.G., Erdey, M.D., Dieter, B.E., Golden, N.E., Johnson, S.Y., Endris, C.A., Hartwell, S.R., Kvitek, R.G., Davenport, C.W., Krigsman, L.M., Ritchie, A.C., Sliter, R.W., Finlayson, D.P., and Maier, K.L. (G.R. Cochrane and S.A. Cochran, eds.), 2015, California State Waters Map Series—Offshore of Pigeon Point, California: U.S. Geological Survey Open-File Report 2015–1232, pamphlet 40 p., 10 sheets, scale 1:24,000, http://dx.doi.org/10.3133/ofr20151232.

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        Year Published: 2015

        California State Waters Map Series—Offshore of Fort Ross, California

        Introduction In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP), designed to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats, and geology within the 3-nautical-mile limit of California’s State Waters. The CSMP approach is to create highly...

        Johnson, Samuel Y.; Cochran, Susan A.; Johnson, Samuel Y.; Dartnell, Peter; Golden, Nadine E.; Hartwell, Stephen R.; Erdey, Mercedes D.; Greene, H. Gary; Cochrane, Guy R.; Kvitek, Rikk G.; Manson, Michael W.; Endris, Charles A.; Dieter, Bryan E.; Watt, Janet T.; Krigsman, Lisa M.; Sliter, Ray W.; Lowe, Erik N.; Chin, John L.
        Johnson, S.Y., Dartnell, P., Golden, N.E., Hartwell, S.R., Erdey, M.D., Greene, H.G., Cochrane, G.R., Kvitek, R.G., Manson, M.W., Endris, C.A., Dieter, B.E., Watt, J.T., Krigsman, L.M., Sliter, R.W., Lowe, E.N., and Chin, J.L. (S.Y. Johnson and S.A. Cochran, eds.), 2015, California State Waters Map Series—Offshore of Fort Ross, California: U.S. Geological Survey Open-File Report 2015–1211, pamphlet 37 p., 10 sheets, scale 1:24,000, http://dx.doi.org/10.3133/ofr20151211.

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        Year Published: 2015

        The 2014 update to the National Seismic Hazard Model in California

        The 2014 update to the U. S. Geological Survey National Seismic Hazard Model in California introduces a new earthquake rate model and new ground motion models (GMMs) that give rise to numerous changes to seismic hazard throughout the state. The updated earthquake rate model is the third version of the Uniform California Earthquake Rupture Forecast...

        Powers, Peter M.; Field, Edward H.

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        Year Published: 2015

        Validation of simulated earthquake ground motions based on evolution of intensity and frequency content

        Simulated earthquake ground motions can be used in many recent engineering applications that require time series as input excitations. However, applicability and validation of simulations are subjects of debate in the seismological and engineering communities. We propose a validation methodology at the waveform level and directly based on...

        Rezaeian, Sanaz; Zhong, Peng; Hartzell, Stephen H.; Zareian, Farzin

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        Year Published: 2015

        Health and condition of endangered juvenile Lost River and shortnose suckers relative to water quality and fish assemblages in Upper Klamath Lake, Oregon, and Clear Lake Reservoir, California

        Executive Summary Most mortality of endangered Lost River (Deltistes luxatus) and shortnose (Chasmistes brevirostris) suckers in Upper Klamath Lake, Oregon, appears to occur within the first year of life. However, juvenile suckers in Clear Lake Reservoir, California, appear to survive longer and may even recruit to the spawning populations. Our...

        Burdick, Summer M.; Elliott, Diane G.; Ostberg, Carl O.; Conway, Carla M.; Dolan-Caret, Amari; Hoy, Marshal S.; Feltz, Kevin P.; Echols, Kathy R.
        Burdick, S.M., Elliott, D.G., Ostberg, C.O., Conway, C.M., Dolan-Caret, A., Hoy, M.S., Feltz, K.P., and Echols, K.R., 2015, Health and condition of endangered juvenile Lost River and shortnose suckers relative to water quality and fish assemblages in Upper Klamath Lake, Oregon, and Clear Lake Reservoir, California: U.S. Geological Survey Open-File Report 2015-1217, 56 p., http://dx.doi.org/10.3133/ofr20151217.

        Filter Total Items: 1,116
        fault scarp
        July 6, 2019

        Fault scarp near epicenter of Searles Valley earthquake

        Fault scarp close to the epicenter. In this location the fault has a main strand where much of the slip occurred, as well as distributed fractures.

        Image shows a crack in a road with a pen for scale
        July 4, 2019

        Earthquake Damage on California Hwy. 178

        A fault offset on California State Route 178 following the Magnitude 6.4 earthquake that struck Searles Valley on July 4, 2019.

        Image shows a woman measuring a crack in the roadway
        July 4, 2019

        Measuring Earthquake Damage on California Hwy. 178

        Janis Hernandez (California Geological Survey) measures 18 centimeters of offset across one strand of the fault rupture zone. This measurement was conducted following the Magnitude 6.4 earthquake that struck Searles Valley on July 4, 2019.

        Image shows people in the distance measuring cracks in the roadway
        July 4, 2019

        Measuring Earthquake Damage on California Hwy. 178

        Measurement of fault offset being done by USGS scientist Ken Hudnut, using the offset of a painted road stripe. This measurement was conducted following the Magnitude 6.4 earthquake that struck Searles Valley on July 4, 2019.

        Image shows people and trucks in the distance, measuring cracks in the roadway
        July 4, 2019

        Measuring Earthquake Damage on California Hwy. 178

        Measurement of fault offset being done by USGS scientist Ken Hudnut, using the offset of a painted road stripe on California State Route 178. This measurement was conducted following the Magnitude 6.4 earthquake that struck Searles Valley on July 4, 2019.

        Image shows hands and a tape measure around a crack in the roadway
        July 4, 2019

        Measuring Earthquake Damage on California Hwy. 178

        Measuring a fault offset on California State Route 178. This measurement was conducted following the Magnitude 6.4 earthquake that struck Searles Valley on July 4, 2019.

        Image shows a crack in the road with a pen for scale
        July 4, 2019

        Earthquake Damage on California Hwy. 178

        A fault offset on California State Route 178 with a pen for scale. This measurement was conducted following the Magnitude 6.4 earthquake that struck Searles Valley on July 4, 2019.

        Image shows a side view of a roadway with a large crack in it
        July 4, 2019

        Earthquake Damage on California Hwy. 178

        California State Route 178, showing cracks due to fault offsets following the Magnitude 6.4 earthquake that struck Searles Valley on July 4, 2019.

        Image shows a crack in the ground with a tape measure over it
        July 4, 2019

        Surface Rupture from Fault

        On July 4, 2019, a Magnitude 6.4 earthquake struck Searles Valley, CA. This photo provides likely evidence that the fault that hosted the earthquake ruptured to the ground surface.

        Image shows a crack in the ground with a truck in the background
        July 4, 2019

        Surface Rupture from Fault

        On July 4, 2019, a Magnitude 6.4 earthquake struck Searles Valley, CA. This photo provides likely evidence that the fault that hosted the earthquake ruptured to the ground surface.

        Mt. Diablo as seen from Twitchell Island
        July 2, 2019

        Mt. Diablo as seen from Twitchell Island

        Mt. Diablo as seen from Twitchell Island

         Close-up of a wetland, showing multiple sources of DOM
        July 2, 2019

        Close-up of a wetland, showing multiple sources of DOM

         Close-up of a wetland, showing multiple sources of DOM

        Filter Total Items: 987
        Sandy ocean beach with low cliffs on the right side. Ocean visible at left side. One person walking on beach
        February 14, 2017

        In a study released today, U.S. Geological Survey scientists and their colleagues document how the 2015-16 winter featured one of the most powerful El Niño climate events of the last 145 years.

        K2 Seismic Station
        February 2, 2017

        The U. S. Geological Survey is seeking volunteers to host temporary seismic stations in the Walnut Creek/Pleasant Hill/Concord California area. Volunteers will be assisting with a new ground motion study that will begin in March 2017.

        A picture of a USGS scientist paddling down a flooded street
        January 27, 2017

        For many Californians a wet and snowy winter means keeping dry inside and avoiding dangerous roads. For field crews at the U.S. Geological Survey California Water Science Center (CAWSC), however, wet weather means piling on safety gear and chasing storms to make real-time high-flow and flood measurements at swollen rivers, creeks, and waterways throughout the state.

        Clark's Grebe at Thermalito Afterbay, CA
        January 24, 2017

        A new study published in PLOS ONE demonstrates that current conservation planning efforts for waterbird habitat in the Central Valley can likely compensate for habitat loss through the middle of the century.

        Scientist collects samples from a temporary wooden platform in a New Jersey salt marsh
        January 24, 2017

        If coastal salt marshes are like savings accounts, with sediment as the principal, all eight Atlantic and Pacific coast salt marshes studied are "in the red," researchers found.

        head shot of man
        January 19, 2017

        The U.S. Geological Survey is pleased to announce the selection of Dr. Guy Gelfenbaum as the new director of their Pacific Coastal and Marine Science Center in Santa Cruz, California Gelfenbaum succeeds Dr. Robert Rosenbauer who held the position for the past six years. Rosenbauer is retiring to a Scientist Emeritus position.

        Photo of a young girl drinking water, which likely originated from groundwater sources. 
        January 19, 2017

        A regional assessment of untreated groundwater in the Basin and Range basin-fill aquifers, which include parts of Nevada, California, Arizona, Utah and adjacent states, is now available from the U.S. Geological Survey.

        Man in orange safety suit and helmet, and thumb up,  standing while riding a personal watercraft
        January 12, 2017

        On January 13, scientists from the U.S. Geological Survey will be working on the beach in Santa Cruz at the mouth of the San Lorenzo River. Using a sonar-equipped boat and personal watercraft, they will be surveying the beach and the nearby ocean bottom to compile a three-dimensional map of how the beach changed during storms that struck this week.

        USGS: Science for a changing world
        January 10, 2017

        The U.S. Geological Survey’s California Water Science Center is hosting a media event Wednesday, Jan. 11 at a USGS streamgage location about 7 miles north of Santa Cruz, California. A hydrologist will be available for interviews as field crews collect streamflow data.

         

        Image: USGS Logo
        January 8, 2017

        The U.S. Geological Survey’s California Water Science Center is hosting a media event Monday, Jan. 9 at a USGS streamgage location below Friant Dam, a streamflow site with significance to the San Juan River Restoration Project.

        A man sits at a desk in front of a computer monitor and keyboard, pointing to the image and talking.
        December 30, 2016

        USGS scientists and their coauthors from the California Coastal Records Project have found a way to use historical aerial photographs not just to see evidence of coastal erosion, but to accurately measure how much has occurred over time.

        Filter Total Items: 240